Aldon Smith’s arrest for DUI and marijuana possession Friday morning hasn’t swayed the 49ers’ plan to play him Sunday against the Indianapolis Colts.

“I expect Aldon to be back to work and playing Sunday,” coach Jim Harbaugh said.

Harbaugh said any forthcoming discipline is “pretty exclusive to the league” and is expecting “the process” to play out before any potential suspension is imposed on Smith, the 49ers’ sack leader since his 2011 rookie season.

“There will be consequences,” Harbaugh added.

Asked for comment, Smith replied “not right now” as he headed to the weight room for a post-practice workout.

Less than 4 hours after San Jose police arrested him and he posted subsequent bail, Smith participated in the 90-minute practice, albeit in limited fashion because of a back injury that’s hindered him all week.

“Seemed like he had his wits about him,” Harbaugh said of how Smith practiced.

Compounding the 49ers’ 0-3 start is that their past two defeats have come against NFC West rivals. Up next is another division opponent Sunday, when the 49ers visit the Arizona Cardinals. Here are some answers to pressing questions: Did Hoyers second half performance save him from a benching this season? — Far Side of Sports (@FarSideOfSports) September 25, 2017 At...